John a



1TB iSTATE-S JOHN A. JUST, OF SYRACUSE, NEW YORK, ASSIGNOR TO THE ASPHALTINA COMPANY OF AMERICA, OF SAME PLACE.

PAVING R aoorme'conPosmon AND METHOD OF MAKING SAME.

filPECIFICATION forming part of Letters fatent N 0. 540,792, dated June 11, 1895.

I Application filed January 16, 1 895. Serial No. 535,124. (No specimens.)

To all whom it may concern.-

Be it known that I, JOHN A. JUST, a citizen of the United States, residing at Syracuse, in the county of Onondaga and State of New 5 York, have invented a new and useful Improvement in Paving or Roofing Compositions and Methods of Making the Same, of which the following is a specification;

This invention relates to that class of compositions which are suitable for paving and the manufacture of drain pipes and similar uses.

The object of my invention is to produce a strong and durable composition which is man ufactured from coal, wood or petroleum tar as one of the principal raw materials and which is compounded in a simple way and produces very strong and serviceable compositions when mixed with the necessary quantity of mineral matter.

In preparing this improved composition I proceed as follows: Coal, Wood or petroleum tar is heated to a temperature of from 280 to 350 Fahrenheit to expel the water and the more volatile hydrocarbon ingredients therefrom. In order to obtain a product having higher softening and flowing points and greater uniformity of character, and to render it tough, sulphur is added at thistemperaturo and mixed with the tar gradually, or preferably in small quantities at a time, waiting after each addition of sulphur for the chemical action to subside. The proportion of sulphur to the tar depends somewhat upon the degree of hardness and tenacity which is required in the final product and the use for which the final product is intended, but approximately stated the proportion of sulphur may range from ten to twenty parts, by weight, to from one hundred and seventy-five to three hundred parts of tar. The chemical action of the sulphur upon the light hydrocarbon constituents of the tar takes place approximately at a temperature of 310 Fahrenheit, differing somewhat according to the nature of the tar, and consists partly in the elimination of the more volatile hydrocarbons as sulphureted hydrocarbons and partly in forming sulphureted hydrocarbon compounds which or vapors.

ents has taken place.

are not volatile except at temperatures above 400 Fahrenheit and which remain and play an important part in the uniformity and stability of the product. WVhen all the sulphur has been added the temperature is raised to about 400 Fahrenheit to drive off the gases The temperature of the sulphurized tar is next lowered to about 280 Fahrenheit and an equal quantity, or thereabout, of rosin is added and thoroughly mixed with the sulphurized tar. I prefer to use common 63 rosin for this purpose. The temperature of the mixture is kept at from 280 to 350 Fahrenheit until aperfect union of the ingredi- From this primary composition, composed of sulphurized tar and 65 rosin, several grades of cementing compositions can be prepared, differing in hardness, strength, tenacity, &c., by mixing with said primary composition a sulphurized heavy hydrocarbon having, after evaporation of the water contained in the hydrocarbon, its boiling point at 400 Fahrenheit, or higher. I

prefer for this heavy hydrocarbon the petroleum sediment which remainsiu the storing tanks after the crude petroleum has been drawn off and which is commercially known as B. S. This petroleum sediment is treated by heating it to a temperature of about 350 Fahrenheit and adding sulphur thereto, preferably about one part, by weight, of sulphur to eight parts of the sediment. The sulphur drives off the lighter hydrocarbons and en ables the heavy hydrocarbons to better resist changes in temperature and other influences. This sulphurized heavy hydrocarbon is intimately mixed with the primary composition consisting of sulphurized tar and rosin, pref erably at'a temperature of from 280 to 350 Fahrenheit and may be added to the primary composition in the vessel in which the latter go is prepared as soon as the ingredients of the primary composition have become thoroughly united. The mixture is next drawn 01f into barrels or packages for future use, or can be mixed at once with the mineral matter suitable for producing the desired final composition, preferably at a temperature of about 300 Fahrenheit.

By adding one part, by weight, of sulphurized heavy hydrocarbon to four parts of the too primary composition a very elastic and tough cementing composition is produced which when mixed with mineral matter, such as sand, earth, ground stone, 850., in about the proportion of from ten to eighteen parts of cementing material to from ninety to eightytwo of mineral matter is well adapted for roofing and other purposes where an elastic Waterproof material is desired which can stand the heat of summer and the cold of winter without appreciable change.

By adding three-fourths of one part, by weight, of sulphurized heavy hydrocarbon to four parts of the primary composition a cementing composition of less elasticity and greater hardness is produced.

By adding one-half of one part, by weight, of sulphurized heavy hydrocarbon to four parts of the primary composition a very strong cementing composition is produced, retaining a marked degree of elasticity and toughness and when combined in the above described proportion with mineral matter testing as high as seven hundred to nine hundred pounds per square inch tensile strain. The composition is especially adapted for the construction of pavements and other uses where a very tough material is required.

By adding one-fourth of one part, by weight, of snlphurized heavy hydrocarbon to four parts of the primary product an exceedingly hard composition is produced which, incorporated with the above described proportion of mineral matter, tests from eight hundred to one thousand pounds per square inch tensile strain and which is especially adapted for the manufacture of drain pipes and similar hollow articles requiring great hardness and strength in the material.

Intermediate grades differing correspondingly in hardness and toughness may be produced by changing the proportion of the sulphurized heavy hydrocarbon to the primary composition.

The primary composition may also be employed without the heavy hydrocarbon by mixing it directly with the required amount of mineral matter, usually in the proportion of fifteen to eighteen parts of the composition to eighty-five to eighty-two parts of the mineral matter. The final com position so produced is very hard, strong and water proof, testing as high as eight hundred to one thousand pounds per square inch and upward tensile strain and is suitable for the manufacture of pipes, &c.

I claim as my invention- 1. The herein described method of prod ucing a composition of matter which consists in treating tar with sulphur in substantially the proportion specified at a temperature of from 280 to 400 Fahrenheit, and then lowering the temperature and adding rosin to the sulphurizcd tar, substantially as set forth.

2. The herein described composition of matter consisting of tar combined with sulphur substantially in the proportion specified, rosin and a sulphurized heavy hydrocarbon, sub stantially as set forth.

3. The herein described method of producing a composition of matter which consists in treating tar with sulphur in substantially the proportion specified, at a temperature of from 280 to 400 Fahrenheit, then lowering the temperature and adding rosin to the sulphurized tar, and then adding a sulphurized heavy hydrocarbon, substantially as set forth.

Witness my hand this 10th day of January, 1895.

JOHN A. JUST.

Witnesses:

J ULIE R. JENNEY, EDWARD WILHELM. 

